Taking losses

Now I get it, you can not win every single game. It would have to be a miracle in order for something like that to happened. There is always gonna be a point where you have to take a lose. As of lately however it feels as if I'm taking too many losses and only a rare win here and there. All in ranked by the way. My one question I have is something along the lines of attitude. When do you get to the point where you say Enough is enough? When is it alright for a player to put their foot down and say,"I'm sick and tired of losing". I feel like I have gotten to that point so is it okay to be like this?